Shizuoka Institute of Science and Technology

www.sist.ac.jp
Fukuroi, Japan

Shizuoka Institute of Science and Technology , or SIST, is a private university in Fukuroi, Shizuoka, Japan. The predecessor of the school was founded in 1940 as a driving school. It was chartered as a university in 1991, specializing in mechanical engineering, electrical engineering and computer technology. The university has approximately 1500 students in two faculties: the Faculty of Science and Technology and the Faculty of Comprehensive Informatics.The university has reciprocal relationships with Daegu University in South Korea and Zhejiang Gongshang University in China. Wikipedia.

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Yanai S.,Shizuoka UniversityShizuoka | Saito T.,Shizuoka Institute of Science and Technology
Advances in Intelligent Systems and Computing | Year: 2017

We have developed a novel particle classification technique using kHz-band ultrasound in water. By irradiating kHz-band ultrasound in a particle-liquid mixture, we found out that swarm-like flocculation of particles is formed in the liquid. This particle flocculation is caused by Acoustic-Cavitation-Oriented Bubbles (ACOBs) generated by the ultrasound. This novel technique can be applied to a wide range of particle sizes from several hundred lm to several mm. In the present study, we carefully manipulate the flocculation and intend to apply this to a new technique of particle classification. © Springer International Publishing AG 2017.


Matsunaga R.,Shizuoka Institute of Science and Technology | Matsunaga R.,Hokkaido University | Yokosawa K.,Hokkaido University | Abe J.-I.,Hokkaido University
Neuropsychologia | Year: 2014

Bilingual studies have shown that brain activities for first (L1) and second (L2) languages are influenced by L2 proficiency. Does proficiency with a second musical system (M2) influence bimusical brains in a manner similar to that of bilingual brains? Our magnetoencephalography study assessed the influence of M2 proficiency on the spatial, strength, and temporal properties of brain activity in a musical syntactic-processing task (i.e., tonal processing) involving first (M1) and second (M2) music systems. Two bimusical groups, differing in M2 proficiency (high, low), listened to melodies from both their M1 and M2 musical cultures. All melodies ended with a tonally consistent or inconsistent tone. In both groups, tonal deviations in both M1 and M2 elicited magnetic early right anterior negativities (mERANs) that were generated from brain areas around the inferior frontal gyrus (IFG). We also analyzed the dipole locations, dipole strengths, and peak latencies of mERAN. Results revealed: (a) the distances between dipole locations for M1 and M2 were shorter in the M2 high-proficiency group than in the M2 low-proficiency group; (b) the dipole strengths were greater in the high than the low group; (c) the peak latencies of M2 were shorter in the high than low group. The dipole location results were consistent with those from bilingual studies in that the distances between the (left) IFG peak activations for L1 and L2 syntactic processing shortened as L2 proficiency increased. The parallel results for bimusicals and bilinguals suggest that the functional changes induced by proficiency in a second (linguistic or musical) system are defined by domain-general neural constraints. © 2013 Elsevier Ltd.


Rachmawati H.,Bandung Institute of Technology | Yanda Y.L.,Bandung Institute of Technology | Rahma A.,Bandung Institute of Technology | Mase N.,Shizuoka Institute of Science and Technology
Scientia Pharmaceutica | Year: 2016

Curcumin is a polyphenolic compound derived from Curcuma domestica (Zingiberaceae) that possesses diverse pharmacological effects including anti-inflammatory, antioxidant, antimicrobial, and anticarcinogenic activities. Although phase I clinical trials have shown curcumin as a safe drug even at high doses (12 g/day) in humans, poor bioavaibility largely limits its pharmacol-ogical activity. Nanoencapsulation in biodegradable polymers is a promising alternative to improve curcumin bioavaibility. In this study, curcumin was encapsulated in biodegradable polymer poly-(lactic acid) (PLA) nanoparticles via the emulsification-solvent evaporation method. Optimization of selected parameters of this method including the type of solvent, surfactant concentration, drug loading, sonication time, and centrifugation speed, were performed to obtain polymeric nano-carriers with optimum characteristics. Dichloromethane was used as the solvent and vitamin E polyethylene glycol succinate (TPGS) was used as the surfactant. Four minutes of sonication time and centrifugation at 10500 rpm were able to produce spherical nanoparticles with average size below 300 nm. The highest encapsulation efficiency was found on PLA nanoparticles containing 5% of curcumin at 89.42 ± 1.04%. The particle size, polydispersity index, zeta potential of 5% curcumin-PLA nanoparticles were 387.50 ± 58.60 nm, 0.289 ± 0.047, and −1.12 mV, respectively. Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD) studies showed partial interaction between the drug and polymer. © Rachmawati et al.


Deguchi K.,Shizuoka Institute of Science and Technology
Journal of the Physical Society of Japan | Year: 2015

A pyroelectric charge measurement was carried out for Pb(Mg1/3Nb2/3)O3 over the wide temperature range from 80 to 475 K. Macroscopic polarization was observed up to 420 ± 30 K, with marked changes at approximately 200 and 420 K. The first component of a polarization developing below 200 K is about 20 μC/cm2, and the second component developing below 420 K is about 4 μC/cm2. These components can be observed together or selectively depending on field cooling conditions, indicating that these components have respective origins that are different from each other. The results provide direct evidence of the occurrence of the static polar nanoregion below around 420 K. ©2015 The Physical Society of Japan.


Hatano H.,Shizuoka Institute of Science and Technology
IEICE Transactions on Electronics | Year: 2010

Single event transient (SET) effects on original static cascade voltage switch, logic (CVSL) exclusive-OR (EX-OR) circuits have been investigated using SPICE. SET simulation results have confirmed that the static CVSL EX-OR circuits have increased tolerance to SET. The static CVSL EX-OR circuit is more than 200 times harder than, the conventional CMOS circuit. Copyright © 2010 The Institute of Electronics, Information and Communication Engineers.


Kirihara M.,Shizuoka Institute of Science and Technology
Coordination Chemistry Reviews | Year: 2011

Aerobic oxidation of α-hydroxy ketones catalyzed by dichloroethoxyoxovanadium in ethanol causes a carbon-carbon bond cleavage that produces diesters or diketones. This reaction is highly chemoselective, and disecondary glycols do not react at all. However, ditertiary glycols effectively react with dichloroethoxyoxovanadium or trichlorooxovanadium to provide the corresponding ketones. Aerobic oxidation of α-hydroxy ketones catalyzed by dichloroethoxyoxovanadium or trichlorooxovanadium in aprotic solvents almost quantitatively affords the corresponding α-diketones. The reaction of tertiary cyclopropanol compounds with vanadyl acetylacetonate under an oxygen atmosphere causes fragmentation of the cyclopropane moiety to produce β-hydroxy ketones and β-diketones. For the 6-substituted bicyclo[4.1.0]heptanol derivatives, the endoperoxides are also obtained together with β-hydroxy ketones. Conversely, 2-ethoxycarbonylcyclopropyl silyl ethers produce γ-oxocarboxylate derivatives given the same reaction conditions. Monothioacetals are easily deprotected into carbonyls using a catalytic amount of trichlorooxovanadium in 2,2,2-trifluoroethanol under an oxygen atmosphere. Thiols are converted into the corresponding disulfides by the aerobic oxidation catalyzed by trichlorooxovanadium in the presence of molecular sieves 3A. Polymer-supported vanadium compounds are synthesized by the reaction of vanadium oxytrichloride with polymers bearing hydroxyl moieties. The catalyst prepared from TentaGel S OH was highly active and reusable for the aerobic oxidations. © 2011 Elsevier B.V.


Hatano H.,Shizuoka Institute of Science and Technology
IEICE Transactions on Electronics | Year: 2011

Clocked cascade voltage switch logic (C2VSL) circuits with gated feedback were newly designed for synchronous systems. In order to investigate single event transient (SET) effects on the C2VSL circuits, SET effects on C2VSL EX-OR circuits were analyzed using SPICE. Simulation results have indicated that the C2VSL have increased tolerance to SET. Copyright © 2011 The Institute of Electronics, Information and Communication Engineers.


Kirihara M.,Shizuoka Institute of Science and Technology
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry | Year: 2015

Hydrogen peroxide is one of the ideal oxidants in organic synthesis and green chemistry because the waste produced from hydrogen oxide-oxidation is nontoxic water. We have developed several synthetic reactions using hydrogen peroxide as the oxidant catalyzed by transition metals or combinations of transition metals and halide ions (halogen anions). Electrophilic bromination and oxidation of organosulfur compounds (dithioacetals, thiols and sulfides) can be achieved and be selectively obtained the desired products in high yields. Selective oxidation of sulfides to sulfoxides using hydrogen peroxide has also been achieved under catalyst-free conditions using a T-shaped microreactor.


Sasaki S.,Shizuoka Institute of Science and Technology
e-Journal of Surface Science and Nanotechnology | Year: 2010

In usual quantum Hall devices, electric current flows through a thin layer with a uniform thickness. We consider a new quantum Hall device which has an potential barrier in the layer. Then the electrons flow by a tunnelling effect through the potential barrier. We investigate phenomena on the new quantum Hall device. Then voltage steps may appear in the curve of voltage V versus electric current I, when the magnetic field value is modulated by oscillation with a constant frequency f. The step value V is related to the transfer charge Q as V = (2πhf)/\Q\. The value of the transfer charge Q depends on the quantum Hall state. The usual theory implies that this value |Q| is e (elementary charge) for an integer quantum Hall state, and is? e for a fractional quantum Hall state with fractional filling factor?. We examine the structure of the devices and show three types of them. Thereafter observation of this tunneling effect is investigated in details and it is clarified that the frequency value f should be within the special region. We find that the curve of (I, V) has several shapes. © 2010 The Surface Science Society of Japan.


Kunimochi Y.,Shizuoka Institute of Science and Technology
International Journal of Foundations of Computer Science | Year: 2016

This paper deals with insertability and mainly extractablity of codes. A code C is called insertable (or extractable) if the free submonoid C∗generated by C satisfies if z, xy C∗implies xzy C∗(or z, xzy C∗implies xy C∗). We show that a finite insertable code is a full uniform code. On the other hand there are many finite extractable codes which are not full uniform codes. We cannot still characterize the structures of infinite extractable codes. Here we give some results on the class of infix extractable codes. First, we consider a necessary and sufficient condition whether a given infix code C is extractable or not by using the syntactic graph of the code. Secondly, we investigate the extractability for the families of other related bifix codes. We newly define the bifix codes, called e(m)-codes and ē-codes, and refer to the extractability of them. © 2016 World Scientific Publishing Company.

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